package com.atguigu.gulimall.auth.controller;

import com.alibaba.fastjson.TypeReference;
import com.atguigu.common.constant.AuthServerConstant;
import com.atguigu.common.exception.BizCodeEnum;
import com.atguigu.common.utils.R;
import com.atguigu.common.vo.MemberRespVo;
import com.atguigu.gulimall.auth.feign.MemberFeignService;
import com.atguigu.gulimall.auth.feign.ThirdPartFeignService;
import com.atguigu.gulimall.auth.vo.UserLoginVo;
import com.atguigu.gulimall.auth.vo.UserRegistVo;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.util.StringUtils;
import org.springframework.validation.BindingResult;
import org.springframework.validation.FieldError;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import javax.servlet.http.HttpSession;
import javax.validation.Valid;
import javax.validation.constraints.NotEmpty;
import java.util.*;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;
@Controller
public class LoginController {
    /*
    @GetMapping("/login.html")
    public String loginPage(){
        return "login" ;
    }
    @GetMapping("/reg.html")
    public String regPage(){
        return "reg" ;
    }
    */
    @Autowired
    ThirdPartFeignService thirdPartFeignService ;
    @Autowired
    StringRedisTemplate stringRedisTemplate ;
    @Autowired
    MemberFeignService  memberFeignService ;
    @ResponseBody
    @GetMapping("/sms/sendcode")
    public R sendCode(@RequestParam("phone")String phone){
        //    TODO    1 接口防刷
        String redisCode = stringRedisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX + phone);
        if(!StringUtils.isEmpty(redisCode)){
            long l = Long.parseLong(redisCode.split("_")[1]);
            if(System.currentTimeMillis()-l<60000){
                //60秒内不能再发
                return R.error(BizCodeEnum.SMS_CODE_EXCEPTION.getCode(),BizCodeEnum.SMS_CODE_EXCEPTION.getMsg());
            }
        }
//        2 验证码的再次校验 redis 存key-phone,value-code  sms:code:18270812217 -> 9527
        String code = UUID.randomUUID().toString().replaceAll("[^0-9]+","").substring(0,4);
        String substring = code+"_"+System.currentTimeMillis();
        //redis缓存验证码，防止同一个手机号在60秒内再次发送
        stringRedisTemplate.opsForValue().set(AuthServerConstant.SMS_CODE_CACHE_PREFIX+phone,substring,5, TimeUnit.MINUTES);
        thirdPartFeignService.sendCode(phone,code);
        return R.ok();
    }
    //TODO 重定向携带数据，利用session原理。将数据放在session中，
    // 只要跳到下一个页面取出这个数据以后，session里面的数据就会删除掉
    //TODO 分布式下的session问题
    @PostMapping("/regist")
    public String regist(@Valid UserRegistVo vo, BindingResult result, RedirectAttributes redirectAttributes){
        if(result.hasErrors()){
            try{
            Map<String,String> errors = result.getFieldErrors().stream().collect(Collectors.toMap(FieldError::getField,FieldError::getDefaultMessage));
           redirectAttributes.addFlashAttribute("errors",errors);
            }catch (Exception e){
                e.printStackTrace();
            }
            //校验出错转发到注册页
            return "redirect:http://auth.gulimall.com/reg.html";
        }
//        真正注册，调用远程服务进行注册
//        1校验验证码
        String code = vo.getCode();
        String s = stringRedisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX + vo.getPhone());
        if(!StringUtils.isEmpty(s)){
            if(code.equals(s.split("_")[0])){
                //验证码通过 //真正的注册，调用远程服务进行注册
                stringRedisTemplate.delete(AuthServerConstant.SMS_CODE_CACHE_PREFIX + vo.getPhone());

                R r = memberFeignService.regist(vo);
                if(r.getCode() == 0){
                    //成功
                    return "redirect:http://auth.gulimall.com/login.html";
                }else{
                    Map<String,String> errors = new HashMap<>();
                    errors.put("msg",r.getData("msg",new TypeReference<String>(){}));
                    redirectAttributes.addFlashAttribute("errors",errors);
                    return "redirect:http://auth.gulimall.com/reg.html";
                }

            }else{
                Map<String,String> errors =new HashMap<>();
                errors.put("code","验证码错误");
                redirectAttributes.addFlashAttribute("errors",errors);
                //校验出错转发到注册页
                return "redirect:http://auth.gulimall.com/reg.html";
            }
        }else{
                Map<String,String> errors =new HashMap<>();
                errors.put("code","验证码错误");
                redirectAttributes.addFlashAttribute("errors",errors);
            //校验出错转发到注册页
            return "redirect:http://auth.gulimall.com/reg.html";
        }
    }
    @GetMapping("/login.html")
    public String loginPage(HttpSession session){
        Object attribute = session.getAttribute(AuthServerConstant.LOGIN_USER);
        if(attribute == null){
            //没登录
            return "login";
        }else{
            return "redirect:http://gulimall.com";
        }
    }

    @PostMapping("/login")
    public String login(UserLoginVo vo, RedirectAttributes redirectAttributes, HttpSession session){

        //远程登录
        R login = memberFeignService.login(vo);
        if(login.getCode()==0){
            MemberRespVo data = login.getData("data", new TypeReference<MemberRespVo>() {
            });
            //成功放到Session中
            session.setAttribute(AuthServerConstant.LOGIN_USER,data);
            return "redirect:http://gulimall.com";
        }else {
            Map<String,String> errors = new HashMap<>() ;
            errors.put("msg",login.getData("msg",new TypeReference<String>(){}));
            redirectAttributes.addFlashAttribute("errors",errors);
            return "redirect:http://auth.gulimall.com/login.html";
        }
    }
}
